This study was conducted to evaluate the impact of stocking density on behavioral patterns, growth performance, blood hormones, and carcass parameters of Sasso broilers within 60 days of rearing cycle. A total number of 150-day old unsexed Sasso (first generation) with initial body weight about 45 ± 3 g, chicks were allocated randomly according to their stocking density to 3 groups 10/m2, 13/m2 and 15/m2 birds per m2. Behavioral patterns and growth performance were estimated throughout the study period. Blood samples for cortisol and thyroid hormones estimation were collected every two weeks. At the end of the study 3 birds from each group were slaughtered to check the effect of stocking density on carcass parameters. The results of the current study revealed that stocking density affect significantly (P